Item holder class. More...

#include <ilviews/gadgets/tree.h>

Inheritance diagram for IlvTreeGadgetItemHolder:

Public Member Functions
void	addItem (IlvTreeGadgetItem parent, IlvTreeGadgetItem item, IlInt index=-1)
	Adds the specified item to the tree hierarchy. More...

virtual IlvGadgetItem *	applyToItems (IlvApplyGadgetItem f, IlAny arg)
	Applies the specified function to all the items of the holder. More...

virtual int	compareItems (const IlvTreeGadgetItem item1, const IlvTreeGadgetItem item2) const
	Compares a pair of items. More...

virtual IlvGadgetItem *	createItem (const char label, IlvGraphic graphic=0, IlvBitmap bitmap=0, IlvBitmap selbitmap=0, IlBoolean copy=IlTrue) const
	Returns a new gadget item. More...

void	deSelectAll ()
	Deselects all the selected items. More...

void	detachItem (IlvTreeGadgetItem *item)
	Removes the specified item from the tree without destroying it. More...

IlvTreeGadgetItem *	getFirstSelectedItem () const
	Retrieves the first selected item. More...

IlUInt	getItemsCount () const
	Returns the number of items in the tree. More...

virtual IlvTreeGadgetItem *	getRoot () const =0
	Returns the root item of the tree hierarchy. More...

IlUInt	getVisibleItemsCount () const
	Returns the number of visible tree items. More...

void	moveItem (IlvTreeGadgetItem item, IlvTreeGadgetItem parent, IlInt index=-1)
	Moves the specified item to a new parent. More...

void	removeItem (IlvTreeGadgetItem *item)
	Removes the specified item from the tree. More...

virtual void	sort (IlvTreeGadgetItem *item=0, IlUInt levels=(IlUInt) -1, IlvTreeGadgetItemCompareFunction func=0)
	Sorts the children of the specified item. More...

Public Member Functions inherited from IlvGadgetItemHolder
virtual void	drawGadgetItem (const IlvGadgetItem item, IlvPort port, const IlvRect &rect, const IlvTransformer t=0, const IlvRegion clip=0) const
	Draws a specific gadget item. More...

IlvGadgetItem *	getCallbackItem () const
	Returns the item that triggered a callback. More...

IlvGadgetItem *	getDragDropTarget () const
	Returns the target item of a drag-and-drop operation. More...

IlvGraphic *	getDraggedImage () const
	Returns the graphic object used to draw the ghost image during a drag-and-drop operation. More...

IlvGadgetItem *	getDraggedItem () const
	Returns the item that is being dragged during a drag-and-drop operation. More...

IlvGadgetItem *	getEditedItem () const
	Returns the item that is being edited. More...

virtual IlvPalette *	getHighlightTextPalette () const
	Returns the highlight palette used to draw the label of highlighted items. More...

virtual IlvPalette *	getInsensitivePalette () const =0
	Returns the palette used to draw an item that is not sensitive. More...

virtual IlvGadgetItem *	getItemByName (const char *name) const
	Returns the item whose name is specified. More...

virtual IlvPalette *	getNormalTextPalette () const =0
	Returns the default palette used to draw an item. More...

virtual IlvPalette *	getOpaquePalette () const
	Returns the opaque palette used to draw opaque items. More...

virtual IlvPalette *	getSelectionPalette () const =0
	Returns the selection palette used to draw selected items. More...

virtual IlvPalette *	getSelectionTextPalette () const =0
	Returns the selection palette used to draw the label of selected items. More...

IlvGadgetItem *	getToolTipItem () const
	Returns the item that is displaying a tooltip. More...

virtual void	initReDrawItems ()
	Begins a redraw session. More...

virtual void	recomputeAllItems ()
	Recomputes the size of all the items managed by the holder. More...

virtual void	reDrawItems ()
	Ends a redraw session. More...

void	setDragDropTarget (IlvGadgetItem *item)
	Sets the target item of a drag-and-drop operation. More...

void	setDraggedImage (IlvGraphic *graphic)
	Sets the graphic object used to draw the ghost image during a drag-and-drop operation. More...

void	setDraggedItem (IlvGadgetItem *item)
	Sets the dragged item. More...

Friends
class	IlvTreeGadgetItem

Additional Inherited Members
Static Public Member Functions inherited from IlvGadgetItemHolder
static IlSymbol *	AbortDragItemCallbackType ()
	Returns the callback type of the Abort Drag callback. More...

static IlSymbol *	AbortEditItemCallbackType ()
	Returns the callback type of the Abort Edit callback. More...

static IlSymbol *	ActivateCallbackType ()
	Returns the callback type of the Activate callback. More...

static IlSymbol *	DragItemCallbackType ()
	Returns the callback type of the Drag Item callback. More...

static IlSymbol *	EndDragItemCallbackType ()
	Returns the callback type of the End Drag callback. More...

static IlSymbol *	EndEditItemCallbackType ()
	Returns the callback type of the End Edit callback. More...

static IlSymbol *	StartDragItemCallbackType ()
	Returns the callback type of the Start Drag callback. More...

static IlSymbol *	StartEditItemCallbackType ()
	Returns the callback type of the Start Edit callback. More...

Protected Member Functions inherited from IlvGadgetItemHolder
virtual void	abortDragItem ()
	Is called when a drag-and-drop operation is aborted. More...

virtual void	abortEdit (IlvGadgetItem *item)
	Is called when the editing of the specified item is aborted. More...

virtual void	drawDraggedImage (const IlvPoint &point, const IlvTransformer *t)
	Is called to draw the ghost image during a drag-and-drop operation. More...

virtual void	endDragItem (const IlvPoint &point)
	Is called when a drag-and-drop operation is finished. More...

virtual void	endEdit (IlvGadgetItem *item)
	Is called after an item has been edited. More...

virtual void	itemActivated (IlvGadgetItem *item)
	Is called when an item is activated. More...

virtual void	itemDeSelected (IlvGadgetItem *item)
	Is called when an item is deselected. More...

virtual void	itemDragged (const IlvPoint &point)
	Is called each time the user moves the mouse during a drag-and-drop operation. More...

virtual void	itemHighlighted (IlvGadgetItem *item)
	Is called when an item is highlighted or unhighlighted. More...

virtual void	itemSelected (IlvGadgetItem *item)
	Is called when an item is selected. More...

virtual void	startDragItem (IlvGadgetItem *item)
	Is called when a drag-and-drop operation begins. More...

virtual void	startEdit (IlvGadgetItem *item)
	Is called when an item is edited. More...

Detailed Description

Item holder class.

Library: ilvadvgdt

IlvTreeGadgetItemHolder is a specialized IlvGadgetItemHolder class for managing a tree hierarchy of IlvTreeGadgetItem objects.

See also: IlvTreeGadgetItem, IlvTreeGadget, IlvHierarchicalSheet.

Member Function Documentation

◆ addItem()

void IlvTreeGadgetItemHolder::addItem	(	IlvTreeGadgetItem *	parent,
		IlvTreeGadgetItem *	item,
		IlInt	index = `-1`
	)

Adds the specified item to the tree hierarchy.

Parameters

parent	The parent item to which the new item will be attached. If parent is `0`, item is added to the root item of the tree hierarchy.
item	The item to be added.
index	The position where item will be added. If index is `-1`, item is added at the end of the parent child list.

See also: IlvTreeGadgetItem::insertChild(), removeItem(), detachItem().

◆ applyToItems()

virtual IlvGadgetItem* IlvTreeGadgetItemHolder::applyToItems	(	IlvApplyGadgetItem	func,
		IlAny	arg
	)

virtual

Applies the specified function to all the items of the holder.

Parameters

func	The function to be applied.
arg	The argument that will be passed to the function func.

Returns: The item that stopped the operation.

See also: IlvApplyGadgetItem, recomputeAllItems(), getItemByName().

Reimplemented from IlvGadgetItemHolder.

◆ compareItems()

virtual int IlvTreeGadgetItemHolder::compareItems	(	const IlvTreeGadgetItem *	item1,
		const IlvTreeGadgetItem *	item2
	)		const

virtual

Compares a pair of items.

If no sorting function is provided, this method is called to compare each item pair. This function simply returns the result of strcmp on the two item labels.

Parameters

item1	The first item.
item2	The second item.

See also: sort().

◆ createItem()

virtual IlvGadgetItem* IlvTreeGadgetItemHolder::createItem	(	const char *	label,
		IlvGraphic *	graphic = `0`,
		IlvBitmap *	bitmap = `0`,
		IlvBitmap *	selbitmap = `0`,
		IlBoolean	copy = `IlTrue`
	)		const

virtual

Returns a new gadget item.

You can override this member function in a subclass to create your own items.

Parameters

label	The item label.
graphic	The `IlvGraphic` object representing the picture associated with the item.
bitmap	The `IlvBitmap` object representing the picture associated with the item.
selbitmap	The `IlvBitmap` object representing the picture of the item when it is selected.
copy	Specifies whether a label should be copied. If the value is `IlFalse`, then you must allocate some memory for the label because in any case the label characters are deleted from the memory by the IlvGadgetItem.

Note: If both the second and third parameters are not 0, only the second parameter is used.

Returns: The created gadget item.

Reimplemented from IlvGadgetItemHolder.

Reimplemented in IlvFileChooserTree, and IlvTreeGadget.

◆ deSelectAll()

void IlvTreeGadgetItemHolder::deSelectAll ( )

Deselects all the selected items.

See also: IlvGadgetItem::select(), IlvGadgetItem::deSelect().

◆ detachItem()

void IlvTreeGadgetItemHolder::detachItem ( IlvTreeGadgetItem * item )

Removes the specified item from the tree without destroying it.

item and all its children are removed but not deleted.

Parameters

item	The item to be removed.

See also: removeItem(), addItem().

◆ getFirstSelectedItem()

IlvTreeGadgetItem* IlvTreeGadgetItemHolder::getFirstSelectedItem ( ) const

Retrieves the first selected item.

Returns: The first selected item in the tree or 0 if there are no selected items.

See also: IlvGadgetItem::select(), IlvGadgetItem::deSelect().

◆ getItemsCount()

IlUInt IlvTreeGadgetItemHolder::getItemsCount ( ) const

Returns the number of items in the tree.

Returns: The number of items in the tree, excluding the root item.

See also: addItem, removeItem, detachItem, getVisibleItemsCount.

◆ getRoot()

virtual IlvTreeGadgetItem* IlvTreeGadgetItemHolder::getRoot ( ) const

pure virtual

Returns the root item of the tree hierarchy.

Returns: The root item of the tree hierarchy.

See also: addItem(), removeItem(), detachItem().

Implemented in IlvTreeGadget.

◆ getVisibleItemsCount()

IlUInt IlvTreeGadgetItemHolder::getVisibleItemsCount ( ) const

Returns the number of visible tree items.

Returns: The number of visible tree items, meaning the number of items whose ancestors are expanded.

See also: IlvTreeGadgetItem::isVisible(), getItemsCount().

◆ moveItem()

void IlvTreeGadgetItemHolder::moveItem	(	IlvTreeGadgetItem *	item,
		IlvTreeGadgetItem *	parent,
		IlInt	index = `-1`
	)

Moves the specified item to a new parent.

Removes item from the tree hierarchy and adds it as a child of parent at the index specified by index.

Parameters

item	The item to be moved.
parent	The new parent item for item.
index	The index where item will be inserted in the child list of parent.

See also: removeItem(), addItem(), detachItem().

◆ removeItem()

void IlvTreeGadgetItemHolder::removeItem ( IlvTreeGadgetItem * item )

Removes the specified item from the tree.

item and all its children are removed and deleted.

Parameters

item	The item to be removed.

See also: detachItem().

◆ sort()

virtual void IlvTreeGadgetItemHolder::sort	(	IlvTreeGadgetItem *	item = `0`,
		IlUInt	levels = `(IlUInt) -1`,
		IlvTreeGadgetItemCompareFunction	func = `0`
	)

virtual

Sorts the children of the specified item.

Runs the sorting algorithm on all the children of item. If you provide a sorting function in the form of an IlvTreeGadgetItemCompareFunction, this function is called to compare each item pair. If you do not provide a sorting function, a default comparison function is used that sort items in the ascendant order using their labels.

Parameters

item	The item whose children are going to be sorted.
levels	An integer value specifying the depth of the sorting algorithm.
func	A sorting function.

See also: IlvTreeGadgetItem::sortChildren(), IlvTreeGadgetItemCompareFunction, compareItems().

Reimplemented in IlvTreeGadget.

Public Member Functions

Friends

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ addItem()

◆ applyToItems()

◆ compareItems()

◆ createItem()

◆ deSelectAll()

◆ detachItem()

◆ getFirstSelectedItem()

◆ getItemsCount()

◆ getRoot()

◆ getVisibleItemsCount()

◆ moveItem()

◆ removeItem()

◆ sort()